<!DOCTYPE html>
<html>
	<head>
		<meta charset="UTF-8">
		<title>7.6表格隔行换色</title>
		<script>
			window.onload = function(){
				//1.获取表格
				var tblEle = document.getElementById("tbl");
				//2.获取表格中tbody里面的行数(长度)
				var len = tblEle.tBodies[0].rows.length;
				//alert(len);
				//3.对tbody里面的行进行遍历
				for(var i=0;i<len;i++){
					if(i%2==0){
						//4.对偶数行设置背景颜色
						tblEle.tBodies[0].rows[i].style.backgroundColor="pink";
					}else{
						//5.对奇数行设置背景颜色
						tblEle.tBodies[0].rows[i].style.backgroundColor="gold";
					}
				}
			}
		</script>

	</head>
	<body>
		<table border="1" width="500" height="50" align="center" id="tbl">
			<thead>
				<tr>
					<th>编号</th>
					<th>姓名</th>
					<th>年龄</th>
				</tr>
			</thead>
			<tbody>
				<tr >
					<td>1</td>
					<td>张三</td>
					<td>22</td>
				</tr>
				<tr >
					<td>2</td>
					<td>李四</td>
					<td>25</td>
				</tr>
				<tr >
					<td>3</td>
					<td>王五</td>
					<td>27</td>
				</tr>
				<tr >
					<td>4</td>
					<td>赵六</td>
					<td>29</td>
				</tr>
				<tr >
					<td>5</td>
					<td>田七</td>
					<td>30</td>
				</tr>
				<tr >
					<td>6</td>
					<td>汾九</td>
					<td>20</td>
				</tr>
			</tbody>
		</table>
	</body>
</html>
